CN101859217B - Capacitor-type touch panel and ghost point judging method - Google Patents

Capacitor-type touch panel and ghost point judging method Download PDF

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CN101859217B
CN101859217B CN 201010203388 CN201010203388A CN101859217B CN 101859217 B CN101859217 B CN 101859217B CN 201010203388 CN201010203388 CN 201010203388 CN 201010203388 A CN201010203388 A CN 201010203388A CN 101859217 B CN101859217 B CN 101859217B
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touch
touch point
direction
system
duty cycle
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CN 201010203388
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CN101859217A (en )
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张智超
朱益男
许朝咏
黄信忠
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中华映管股份有限公司
华映视讯(吴江)有限公司
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Abstract

The invention relates to a capacitor-type touch panel and a ghost point judging method. The capacitor-type touch panel comprises a touch sensing plate and a touch sensing module, wherein the touch sensing plate comprises a plurality of sensing units which are arranged along a first direction and a second direction to form an array, the capacitance values of the sensing units are gradually reducedalong the first direction, and the touch sensing module is coupled with the touch sensing plate for sensing at least two practical touch points.

Description

电容式触碰面板与鬼影点判别方法 The capacitive touch panel and a ghost point determination method

技术领域 FIELD

[0001] 本发明是有关于一种鬼影点判别技术,且特别是有关于一种电容式触碰面板的鬼影点判别技术。 [0001] The present invention relates to a ghost point determination techniques, and more particularly relates to a capacitive ghost point determination of the touch panel technology.

背景技术 Background technique

[0002] 随着信息技术、无线行动通讯和信息家电的快速发展与应用,为了达到携带更便利、体积更轻巧化以及操作更人性化的目的,许多信息产品已由传统之键盘或鼠标等输入装置,转变为使用触碰面板(Touch Panel)作为输入装置。 [0002] With the rapid development and application of information technology, wireless communications and mobile information appliances, in order to achieve more convenient to carry, more compact volume of more humane and operating purposes, many of the information products from the traditional keyboard or mouse input, etc. means conversion using the touch panel (Touch panel) as an input device.

[0003] 目前,触碰面板主要可分电阻式、电容式、音波式、光学式等。 [0003] Currently, the touch panel can be divided mainly resistive, capacitive, acoustic wave, optical, etc. 值得一提的是,在公知技术中,电容式触碰面板在侦测两点触碰时,会有鬼影点(Ghost point)的问题无法被解决。 It is worth mentioning that, in the known technology, the capacitive touch panel when it detects two touches, there will be a problem ghost point (Ghost point) can not be resolved.

[0004] 图1是公知一种电容式触碰面板的鬼影点示意图。 [0004] FIG. 1 is a schematic diagram of a capacitive ghost point of the touch panel is well known. 请参照图1,当两触碰点为P1、 P4时,因多点感测坐标信号无法正确组合还原,而在实际触碰点的对角产生对应鬼影点坐标,即P2、P3 ;反之当两触碰点为P2、P3时,电容式触碰面板同样地会侦测到系统判断触碰点Pl〜P4,包括实际触碰点P2、P3与鬼影点PI、P4。 Referring to FIG 1, when the two touch points P1, P4 when, due to the multipoint sensing coordinate signal can not be restored correctly in combination, in the actual touch point corresponding to a ghost point coordinates generated diagonally, i.e., P2, P3; conversely when the two touch points P2, P3, the capacitive touch panel detects the same manner as the system determines the touch point Pl~P4, comprising touched points P2, P3 and ghost points PI, P4. 因此,电容式触碰面板无法从系统判断触碰点Pl〜P4判别出真实的两个触碰点。 Thus, the capacitive touch panel can not determine the touch point Pl~P4 discriminated real touch point from the two systems.

发明内容 SUMMARY

[0005] 本发明提供一种电容式触碰面板,可改善系统判断触碰点的问题。 [0005] The present invention provides a capacitive touch panel, the touch point may be determined to improve the problems of the system.

[0006] 本发明提供一种鬼影点判别方法,当两点触碰时,系统可从四个系统判断触碰点获得二个实际触碰点。 [0006] The present invention provides a method of determining a ghost point, when the two touch, the system can obtain two touched points is determined from the four-point touch system.

[0007] 本发明提出一种电容式触碰面板,其包括触碰侦测板与触碰侦测模组。 [0007] The present invention provides a capacitive touch panel, comprising a touch panel and a touch detection module detected. 触碰侦测板包括多个侦测单元。 Detecting a plurality of touch panels includes a detecting unit. 上述侦测单元沿第一方向与第二方向排列以形成一阵列。 The above-described first direction and the second direction detecting unit arranged to form an array. 上述侦测单元为电容型态。 The above-described detecting means is a capacitive type. 上述侦测单元的电容值沿第一方向递减。 The capacitance value of the decreasing detection unit in the first direction. 触碰侦测模组耦接触碰侦测板, 用以侦测至少二实际触碰点。 Touch detection module coupled to the touch panel touch detection, for detecting at least two touched points.

[0008] 在本发明的一实施例中,上述侦测单元的电容值沿第二方向维持不变。 [0008] In an embodiment of the present invention, the capacitance value in the second direction of the detection unit remains unchanged.

[0009] 在本发明的一实施例中,当侦测到四个系统判断触碰点时,沿第二方向依序对上述侦测单元进行侦测,以依序侦测到第一责任周期与第二责任周期,再依据第一责任周期与第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点。 [0009] In an embodiment of the present invention, when the detected four touch point determination system, the above-described detecting unit sequentially detects the second direction, to sequentially detect a first duty cycle and a second duty cycle, and then to obtain two touched points is determined from the four systems in accordance with the size of the first touch point and the second duty duty cycle.

[0010] 在本发明的一实施例中,触碰侦测模组包括多个脉宽调变信号产生器与触碰点判断模组。 [0010] In an embodiment of the present invention, the touch detection module comprises a plurality of PWM signal generator and the touch point determining module. 上述脉宽调变信号产生器分别耦接上述侦测单元。 The PWM signal generator are coupled to the above-mentioned detection unit. 假设上述二个实际触碰点落于上述侦测单元的第一侦测单元与第二侦测单元,第一侦测单元与第二侦测单元分别对应于上述脉宽调变信号产生器的第一脉宽调变信号产生器与第二脉宽调变信号产生器,第一脉宽调变信号产生器与第二脉宽调变信号产生器沿第二方向依序排列。 Assuming that the above two actual touch point detecting unit down to the first detecting unit and the second detecting unit, a first detecting unit and the second detecting unit corresponding to the PWM signal generator the first PWM signal generator and a second pulse width modulation signal generator, a first PWM signal generator and a second PWM signal generator arranged sequentially in the second direction. 在此情况下第一脉宽调变信号产生器会先输出对应的第一脉宽调变信号,接着第二脉宽调变产生器会再输出对应的第二脉宽调变信号。 In this case, a first PWM signal generator will first output a first PWM signal corresponding to the second and then the PWM generator will then output a second signal corresponding to the PWM. 第一脉宽调变信号与第二脉宽调变信号的责任周期分别由第一侦测单元与第二侦测单元的电容值所决定。 A first PWM signal with a duty cycle of the second PWM signals are determined by the capacitance value of the first detecting unit and second detecting unit. 触碰点判断模组耦接上述脉宽调变信号产生器, 会依序接收第一脉宽调变信号与第二脉宽调变信号,并依据第一脉宽调变信号与第二脉宽调变信号的责任周期之大小,从上述四个系统判断触碰点中获得上述二个实际触碰点。 Touch point determining module coupled to the PWM signal generator may sequentially receive the first PWM signal and the second PWM signal, and the PWM signal according to the first and second pulse size width modulated duty cycle of the signal change, the system is determined from the four touch points obtained in the above-described two touched points.

[0011] 在本发明的一实施例中,上述四个系统判断触碰点形成一矩形。 [0011] In an embodiment of the present invention, the system determines the four points forming a rectangular touch. 上述四个系统判断触碰点分别为第一系统判断触碰点、第二系统判断触碰点、第三系统判断触碰点与第四系统判断触碰点。 The system determines the four touch points are a first touch point determination system, the second system determines the touch point, the system determines the touch point of the third and the fourth touch point determination system. 第一系统判断触碰点与第四系统判断触碰点位于矩形的一斜对角。 The system determines a first touch point and the touch point is located in the fourth system determines a diagonal of the rectangle. 第二系统判断触碰点与第三系统判断触碰点位于矩形的另一斜对角。 The second and the third touch point determination system determination system of another touch point of the rectangular diagonal. 假设第一系统判断触碰点沿第一方向与第二方向移动皆能朝第四系统判断触碰点靠近。 The system assumed that the first touch point is determined in a first direction and a second direction toward the near Jieneng fourth touch point determination system. 若第一责任周期大于第二责任周期,第一系统判断触碰点与第四系统判断触碰点为上述二个实际触碰点。 If the first duty is greater than the second duty cycle, the system determines a first touch point and the touch point is determined as a fourth system of said two touched points. 若第一责任周期小于第二责任周期,第二系统判断触碰点与第三系统判断触碰点为上述二个实际触碰点O If the first duty is smaller than the second duty cycle, the second and the third touch point determination system determination system of the above-described two touch points touched points O

[0012] 在本发明的一实施例中,第一方向与第二方向垂直。 [0012] In an embodiment of the invention, the first and second directions perpendicular. 换言之,第一方向为水平轴, 第二方向为垂直轴。 In other words, the first direction is the horizontal axis, the second direction is the vertical axis. 或者,第一方向为垂直轴,第二方向为水平轴。 Alternatively, the first direction is the vertical axis, the second direction is a horizontal axis.

[0013] 在本发明的一实施例中,位于上述二个实际触碰点的各侦测单元,其电容值会上升。 [0013] In an embodiment of the present invention, each of the detecting units located at the two actual touch points, the capacitance value increases.

[0014] 从另一角度来看,本发明提出一种鬼影点判别方法,适用于电容式触碰面板。 [0014] From another perspective, the present invention provides a method of determining the ghost points, applicable to capacitive touch panels. 电容式触碰面板包括触碰侦测板与触碰侦测模组。 The capacitive touch panel comprises a touch panel and a touch detection module detected. 触碰侦测板包括多个侦测单元。 Detecting a plurality of touch panels includes a detecting unit. 上述侦测单元沿第一方向与第二方向排列以形成一阵列。 The above-described first direction and the second direction detecting unit arranged to form an array. 第一方向与第二方向垂直。 The first direction is perpendicular to the second direction. 上述侦测单元为电容型态。 The above-described detecting means is a capacitive type. 上述侦测单元的电容值沿第一方向递减。 The capacitance value of the decreasing detection unit in the first direction. 鬼影点判别方法包括当侦测到四个系统判断触碰点时,沿第二方向依序对上述侦测单元进行侦测,以依序侦测到第一责任周期与第二责任周期。 Ghost point discrimination method includes detecting when the system determines that the four-point touch, the above-described detecting unit sequentially detects the second direction, to sequentially detect a first duty and the second duty cycle. 另外,依据第一责任周期与第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点。 Further, to obtain two touched points is determined from the four systems in accordance with the size of the first touch point and the second duty of the duty cycle.

[0015] 基于上述,本发明中,多个侦测单元的电容值沿第一方向递减。 [0015] Based on the above, the present invention, in a first direction decreasing the capacitance value of the plurality of detection units. 当发生四个系统判断触碰点时,可沿与第一方向垂直的第二方向依序对侦测单元进行侦测,以依序获得一第一责任周期与第二责任周期。 When determining the touch point occurs four systems, along a second direction perpendicular to the first direction of the detection unit detects sequentially, to sequentially obtain a first duty and the second duty cycle. 接着再依据第一责任周期与第二责任周期的大小,即可从四个系统判断触碰点判断出二个实际触碰点。 Followed by a first duty cycle based on the magnitude of the second duty cycle, determining the touch point to the two touched points is determined from the four systems.

[0016] 为让本发明的上述特征和优点能更明显易懂,下文特举实施例,并配合所附图式作详细说明如下。 [0016] In order to make the above features and advantages of the present invention can be more fully understood, the following non-limiting embodiment, and the accompanying figures are described in detail below.

附图说明 BRIEF DESCRIPTION

[0017] 图1是公知一种电容式触碰面板的鬼影点示意图。 [0017] FIG. 1 is a schematic diagram of a capacitive ghost point of the touch panel is well known.

[0018] 图2A与图2B是依照本发明的一实施例的一种电容式触碰面板的示意图。 [0018] FIG. 2A and FIG. 2B is a schematic diagram of a capacitive touch panel according to an embodiment of the present invention.

[0019] 图3是依照本发明的一实施例的一种鬼影点判别方法的流程图。 [0019] FIG. 3 is a flowchart according to one embodiment of the ghost point determination method of the present invention.

[0020] 图4是依照本发明的另一实施例的一种电容式触碰面板的示意图。 [0020] FIG. 4 is a schematic diagram of a capacitive touch panel according to another embodiment of the present invention.

[0021] 图5A与图5B是依照本发明的一实施例的一种电容式触碰面板的示意图。 [0021] FIG. 5A and FIG. 5B is a schematic diagram of a capacitive touch panel according to an embodiment of the present invention.

具体实施方式 detailed description

[0022] 公知的电容式触碰面板有鬼影点的问题。 [0022] The well-known problem with a capacitive touch panel ghost point.

[0023] 反观,本发明的实施例在电容式触碰面板中配置了多个侦测单元。 [0023] In contrast, embodiments of the present invention, a plurality of detection units arranged in the capacitive touch panel. 侦测单元沿第一方向与第二方向排列以形成一阵列。 And a second detecting unit arranged to form an array direction along the first direction. 第一方向与第二方向垂直。 The first direction is perpendicular to the second direction. 侦测单元的电容值沿第一方向递减。 Decreasing the capacitance value of the detecting unit in the first direction. 当发生四个系统判断触碰点时,可沿第二方向依序对上述侦测单元进行侦测, 以依序获得第一责任周期(duty cycle)与第二责任周期。 When determining the touch point occurs four systems, may be performed sequentially on the above-described detecting unit detects the second direction, to sequentially obtain a first duty cycle (duty cycle) and the second duty cycle. 接着再依据第一责任周期与第二责任周期的大小,即可从四个系统判断触碰点判断出二个实际触碰点。 Followed by a first duty cycle based on the magnitude of the second duty cycle, determining the touch point to the two touched points is determined from the four systems. 下面将参考附图详细阐述本发明的实施例,附图举例说明了本发明的示范实施例,其中相同标号指示同样或相似的步骤。 The embodiments set forth in detail below with reference to the accompanying drawings of embodiments of the present invention, the drawings illustrate exemplary embodiments of the present invention, wherein like numerals indicate the same or similar steps.

[0024] 图2A与图2B是依照本发明的一实施例的一种电容式触碰面板的示意图。 [0024] FIG. 2A and FIG. 2B is a schematic diagram of a capacitive touch panel according to an embodiment of the present invention. 图3是依照本发明的一实施例的一种鬼影点判别方法的流程图。 3 is a flowchart according to one embodiment of the ghost point a determination method of the present invention. 请合并参照图2A、图2B与图3,电容式触碰面板10包括触碰侦测板20与触碰侦测模组30。 Please refer to FIGS. 2A, 2B and 3, the capacitive touch panel 10 includes a touch panel 20 and the detection module 30 to detect the touch. 触碰侦测板20包括多个侦测单元40。 Touch panel detector 20 includes a plurality of detection unit 40. 在本实施例中,侦测单元40为电容式型态。 In the present embodiment, the detecting unit 40 is a capacitive type. 触碰侦测模组30耦接触碰侦测板20。 Touch detection module 30 detects touch panel 20 coupled to the touch.

[0025] 首先可由步骤S 301,提供多个侦测单元40。 [0025] First, by Step S 301, providing a plurality of detecting unit 40. 侦测单元40沿方向X与方向Y排列, 以形成一阵列。 The detecting unit 40 are arranged in the Y direction and the X direction to form an array. 方向X与方向Y垂直。 X and Y direction perpendicular to the direction. 侦测单元40为电容型态。 The detecting unit 40 is a capacitive type. 在本实施例中,各侦测单元40的电容值沿方向X递减,侦测单元40的电容值沿方向Y维持不变(如图2A与图2B)。 In the present embodiment, the capacitance value of each detection unit 40 in the direction of decreasing X, capacitance values ​​of the direction detecting unit 40 of the Y remain unchanged (FIG. 2A and FIG. 2B). 请注意,侦测单元40的电容值与其感应板的面积成正比。 Note that the detecting unit area is proportional to the capacitance value of the sensing plate 40 thereto. 在本实施例中,可改变各侦测单元的感应板的面积来实现不同电容值的侦测单元。 In the present embodiment, the tablet may be changed in each area detecting unit detecting unit to achieve different capacitance values. 举例来说,可在侦测单元40的感应板上挖洞H。 For example, the detecting unit may be H. In digging sensor pad 40 洞H愈大,感应板的面积则愈小,侦测单元40的电容值也会愈小;反之,洞H愈小, 感应板的面积则愈大,侦测单元40的电容值也会愈大。 The larger hole H, the smaller the area of ​​the sensing plate, the capacitance value of the detecting unit 40 will be smaller; conversely, the smaller the hole H, the greater the area of ​​the sensing plate, the capacitance value of the detecting unit 40 will be more Big.

[0026] 请参照图2A与图2B,假设四个系统判断触碰点分别为系统判断触碰点Pl (XI, Yl)、P2 (X2,Yl)、P3 (XI,Y2)、P4 (X2,Y2)。 [0026] Referring to FIGS. 2A and 2B, the system is assumed that four touch points are determined the system determines the touch point Pl (XI, Yl), P2 (X2, Yl), P3 (XI, Y2), P4 (X2 , Y2). 系统判断触碰点Pl〜Ρ4形成一矩形。 The system determines the touch point Pl~Ρ4 form a rectangular. 系统判断触碰点Ρ1、Ρ4位于矩形的一斜对角。 The system determines the touch point Ρ1, Ρ4 located in a diagonal of the rectangle. 系统判断触碰点Ρ2、Ρ3位于矩形的另一斜对角。 The system determines the touch point Ρ2, Ρ3 located in another diagonal of the rectangle.

[0027] 接着可由步骤S302,当侦测到四个系统判断触碰点Pl〜Ρ4时,触碰侦测模组30 可沿方向Y依序对侦测单元40进行侦测,以依序侦测到责任周期YSl与责任周期YS2 (如图2Α与图2Β)。 [0027] followed by step S302, the system when the detected four touch point determination Pl~Ρ4, touch detection module 30 may detect the direction Y of the unit 40 sequentially detected to sequentially detect YSl measured duty cycle with a duty cycle of YS2 (FIG 2Α FIG 2Β). 请注意,责任周期YSl代表系统判断触碰点Pl (XLYl)或Ρ2(Χ2,Υ1)的信息。 Please note that the duty cycle YSl information represents the system determine the touch point Pl (XLYl) or Ρ2 (Χ2, Υ1) of. 责任周期YS2代表系统判断触碰点Ρ3 (XI,Υ2)或Ρ4 (Χ2,Υ2)的信息。 YS2 duty on behalf of the system determines the touch point Ρ3 (XI, Υ2) information or Ρ4 (Χ2, Υ2) of.

[0028] 值得一提的是,四个系统判断触碰点仅有两种可能性。 [0028] It is worth mentioning that the system determines the touch point four only two possibilities. 一种可能性是两个实际碰触点为PI、Ρ4,其中系统判断触碰点Pl对应的侦测单元40之电容值大于系统判断触碰点Ρ4对应的侦测单元40之电容值;另一可能性是两个实际碰触点为Ρ2、Ρ3,其中系统判断触碰点Ρ2对应的侦测单元40之电容值小于系统判断触碰点Ρ3对应的侦测单元40之电容值。 One possibility is the actual two touch points PI, Ρ4, wherein the system determines the capacitance value of the touch point Pl corresponding to the detecting unit 40 is greater than the system determines the capacitance value corresponding to the touch point detecting unit [rho] 4 of 40; the other one possibility is for the two actual touch points Ρ2, Ρ3, wherein the system determines the capacitance value of [rho] 2 corresponding to the touch point detecting unit 40 is smaller than the capacitance value of the touch point determination system [rho] 3 corresponding to the detection unit 40. 请注意,实际触碰点会使侦测单元40的电容值上升之因素可先忽略。 Please note that the rise factor the actual capacitance value of 40 points will touch detection unit may first be ignored.

[0029] 基于上述,可接续步骤S303,触碰侦测模组30可依据责任周期YSl与责任周期YS2的大小从上述四个系统判断触碰点中获得二个实际触碰点。 [0029] Based on the above, the connection step S303, the touch detection module 30 may be determined from the four duty cycle of the system according YS2 YSl size with duty cycle obtained in two touch points touched points. 若责任周期YSl大于责任周期YS2,代表系统判断触碰点Ρ1、Ρ4为实际触碰点(如图2Α所示);反之,若责任周期YSl 小于责任周期YS2,代表系统判断触碰点Ρ2、Ρ3为实际触碰点(如图2Β所示)。 If the duty cycle is greater than the duty cycle of YS2 YSl, represents the system determining the touch point Ρ1, Ρ4 actual touch point (shown in FIG 2Α); Conversely, if the duty cycle is less than the duty cycle of YS2 YSl, [rho] 2 represents the system determining the touch point, Ρ3 actual touched point (as shown in FIG 2Β). 如此一来即可从四个系统判断触碰点获得两个实际触碰点。 Thus obtained two touched points can determine the touch point from the four systems.

[0030] 值得一提的是,虽然上述实施例中已经对电容式触碰面板与系统判断触碰点判别方法描绘出了一个可能的型态,但所属技术领域中具有通常知识者应当知道,各厂商对于电容式触碰面板与系统判断触碰点判别方法的设计都不一样,因此本发明的应用当不限制于此种可能的型态。 [0030] It is worth mentioning that, although the above embodiment has the touch panel and a capacitive type touch point determination method determining system depicts one possible type, but skilled in the art having ordinary knowledge should be understood, for the manufacturers of capacitive touch panels and touch point determination method determining system design are not the same, so the application of the present invention is not limited to when such possible patterns. 换言之,只要是多个侦测单元的电容值沿第一方向递减,再沿与第一方向垂直的第二方向对上述侦测单元进行侦测,就已经是符合了本发明的精神所在。 In other words, as long as the decremented value of the capacitance in a first direction a plurality of detecting units, and then the above-described detecting unit detects a second direction perpendicular to the first direction, it is already in line with the spirit of the present invention. 以下再举几个实施例以便本领域具有通常知识者能够更进一步的了解本发明的精神,并实施本发明。 The following examples are provided to further few ordinary skills in the art can be better understanding of the spirit of the present invention, and the embodiment of the present invention.

[0031] 上述实施例虽利用挖洞来实现不同电容值的侦测单元,但其仅是一种选择实施例,本发明并不限于此。 [0031] Although the above embodiment is achieved using dig different capacitance values ​​of the detecting unit, but it is only one choice embodiments, the present invention is not limited thereto. 熟习本领域技术者也可依其需求以不同方式来实现不同电容值的侦测单元。 Those skilled in this art also according to their needs in different ways to achieve different capacitance values ​​of the detecting unit. 举例来说,也可改变感应板之间的距离来实现不同电容值的侦测单元。 For example, you can change the distance between the sensing plate to achieve different capacitance values ​​of the detecting unit.

[0032] 上述实施例虽依据责任周期YS1、YS2的大小,从四个系统判断触碰点获得两个实际触碰点,但其仅为一种选择实施例,本发明并不以此为限。 Although the duty cycle based YS1, the size of the [0032] above-described embodiment YS2 obtained two touched points is determined from the four touch point system, but it is only one selected embodiments, the present invention is not limited thereto. . 熟习本领域技术者也可依其需求将电容值转为其它电子信号,再据以间接地判别电容值的大小。 Those skilled in this art will also follow their needs other electronic signals into a capacitance value, and then according to the size of the capacitance value is determined indirectly. 举例来说,图4是依照本发明的另一实施例的一种电容式触碰面板的示意图。 For example, FIG. 4 is a schematic diagram of a capacitive touch panel according to another embodiment of the present invention. 请合并参照图2A、2B与参照图4,在本实施例中,触碰侦测模组30包括多个脉宽调变信号产生器200与触碰点判断模组300。 Please refer to FIGS. 2A, 2B and 4, in the present embodiment, the touch detection module 30 comprises a plurality of the PWM signal generator 200 and the touch point determination module 300 embodiment. 上述脉宽调变信号产生器200分别耦接对应的各侦测单元40。 The PWM signal generator 200 are respectively coupled to each of the detecting unit 40 corresponding to the contact. 脉宽调变信号产生器200可依据对应的侦测单元40之电容值产生脉宽调变信号,其中脉宽调变信号的责任周期会由对应的侦测单元40的电容值所决定。 PWM signal generator 200 may generate a PWM signal according to the capacitance value corresponding to the detecting unit 40, wherein the duty cycle of the PWM signal will be determined by the capacitance value corresponding to the detection unit 40.

[0033] 更具体地说,脉宽调变信号产生器200可包括外部电容201、内部电容202、参考电压产生器203、比较器204、闩锁器205、高频频率产生器206、计数器207、波形产生器208、 开关SWl〜SW3、电阻Rl。 [0033] More specifically, the PWM signal generator 200 may include an external capacitor 201, the internal capacitance 202, the reference voltage generator 203, a comparator 204, latch 205, a radio frequency generator 206, counter 207 , waveform generator 208, a switch SWl~SW3, resistor Rl. 开关SWl〜SW3可用来控制外部电容201、内部电容202的充放电,其中Vdd为定电压。 SWl~SW3 switch used to control an external capacitor 201, charging and discharging of the internal capacitance 202, which is a constant voltage Vdd. 请注意,外部电容201、内部电容202的整体电容值会由侦测单元40的电容值所决定。 Note that the external capacitor 201, the overall capacitance value of the internal capacitance 202 will be determined by the capacitance value of the detection unit 40. 侦测单元40的电容值愈大,外部电容201与内部电容202的整体电容值也会愈大;反之,侦测单元40的电容值愈小,外部电容201与内部电容202的整体电容值也会愈小。 Detection unit 40 the greater the capacitance value of the external capacitor 201 and the overall capacitance value of the internal capacitance 202 will be greater; the other hand, the capacitance value of the detecting unit 40 is smaller, the overall external capacitor 201 and the capacitance value of the internal capacitance 202 is also It will be smaller. 外部电容201与内部电容202的整体电容值愈大,其充放电速度会愈慢,外部电容201与内部电容202的整体电容值愈小,其充放电速度会愈快。 An external capacitor 201 and the capacitance value of the integral capacitance 202 is larger inside which the slower discharge speed, the overall external capacitor 201 and the internal capacitance of the capacitor 202 is smaller, the charge and discharge speed more fast. 参考电压产生器203可提供参考电压Vrf给比较器204。 The reference voltage generator 203 may provide a reference voltage to the comparator 204 Vrf. 比较器204可比较端点A的电压与参考电压Vrf并将比较结果VC输出给闩锁器205。 The comparator 204 may compare the terminal voltage with a reference voltage Vrf and comparing the result to the output VC of the A latch 205.

[0034] 闩锁器205可对比较结果VC进行闩锁并输出闩锁结果VL至计数器207与开关Sff30开关SW3可依据闩锁结果VL而导通或截止。 [0034] The latch 205 can be latched on the comparison result output of latch VC and VL result to the counter 207 and the switch SW3 switch Sff30 results can be based on a latch or VL turned off. 高频频率产生器206可提供高频频率信号给计数器207。 High frequency generator 206 may provide a radio frequency signal to the counter 207. 计数器207可依据闩锁结果VL与高频频率信号进行计数,并将计数结果输出给波形产生器208。 Counter 207 may count result based on the latch signal VL and the high frequency, and outputs the count result to the waveform generator 208. 波形产生器208可依据计数结果产生脉宽调变信号,此脉宽调变信号的责任周期由计数结果所决定。 Waveform generator 208 may generate a PWM signal according to a counting result, this duty cycle of the PWM signal is determined by the count result.

[0035] 值得一提的是,在未触碰的情况下,端点A、B皆会呈现高频信号。 [0035] It is worth mentioning that, in the absence of touch, the endpoint A, B will show both the high frequency signal. 当触碰点发生在电容值相对较大的侦测单元40时,由于外部电容201与内部电容202的充放电速度慢, 端点A、B的频率会相对较小,波形产生器208则会产生责任周期相对较大的脉宽调变信号给触碰点判断模组300。 When the touch point occurs at a relatively large capacitance value detecting unit 40, the external capacitor 201 and the charge and discharge rate of the internal capacitance 202 is slow, the endpoint A, B will be relatively small frequency, waveform generator 208 will produce relatively large duty cycle of the PWM signal to the touch point determining module 300. 当触碰点发生在电容值相对较小的侦测单元40时,由于外部电容201与内部电容202的充放电速度快,端点A、B的频率会相对较大,波形产生器208则会产生责任周期相对较小的脉宽调变信号给触碰点判断模组300。 When the touch point occurs at relatively small values ​​of the capacitance detection unit 40, the external capacitors 201 and 202 charge and discharge the capacitor faster speed of the inner, end A, B of the frequency will be relatively large, the waveform generator 208 will produce relatively small duty cycle of the PWM signal to the touch point determining module 300.

[0036] 触碰点判断模组300耦接上述各脉宽调变信号产生器200,会沿扫描方向(本实施例为方向Y)依序接收到第一脉宽调变信号与第二脉宽调变信号。 [0036] The touch point determining module 300 is coupled to each of the PWM signal generator 200, the scanning direction will sequentially receiving a first signal and a second PWM pulse (Y direction in this example embodiment) width modulated signal. 在本实施例中,第一脉宽调变信号的责任周期可反映责任周期YSl的大小。 In the present embodiment, the duty cycle of the first PWM signal may reflect the size of the duty cycle YSl. 第二脉宽调变信号的责任周期可反映责任周期YS2的大小。 The second duty cycle of the PWM signal, the duty cycle may reflect YS2 size. 触碰点判断模组300可依据第一脉宽调变信号与第二脉宽调变信号的责任周期之大小,从系统判断触碰点Pl〜P4中获得二个实际触碰点。 Touch point determination module 300 may be based on the size of the duty cycle of the first PWM signal and second PWM signals, the system determines the touch point from the obtained Pl~P4 two touched points. 其获得方法可参照上述实施例,在此不再赘述。 Which may be obtained with reference to the above-described method embodiments, not described herein again.

[0037] 另外,图2A、图2B的实施例中,各侦测单元40的电容值是沿方向X递减,但其仅是一种选择实施例,本发明并不以此为限。 [0037] Further, FIGS. 2A, the embodiment of FIG. 2B, the capacitance value of each of the detecting unit 40 is decreasing in the direction X, but it is only one choice embodiments, the present invention is not limited thereto. 举例来说,图5A与图5B是依照本发明的一实施例的一种电容式触碰面板的示意图。 For example, FIGS. 5A and 5B are schematic embodiment of a capacitive touch panel according to an embodiment of the present invention. 图5A、图5B与图2A、图2B相类似。 FIGS. 5A, 5B and FIGS. 2A, 2B is similar to FIG. 不同之处在于,在图5A与图5B中,电容式触碰面板11的触碰侦测板21,其侦测单元40的电容值是沿方向Y递减。 Except that, in FIGS. 5A and 5B, the capacitive touch panel 21 of the touch panel 11 detects the capacitance value of the detecting unit 40 which is decreasing in the Y direction.

[0038] 当侦测到系统判断触碰点Pl〜P4时,触碰侦测模组30可沿方向X依序对侦测单元40进行侦测,以依序侦测到责任周期XSl与责任周期XS2。 [0038] When the system detects when the touch point is determined Pl~P4, touch detection module 30 may detect a direction of X sequentially detecting unit 40 to sequentially detect the duty and responsibility XSl cycle XS2. 若责任周期XSl大于责任周期XS2,代表系统判断触碰点P1、P4为实际触碰点(如图5A所示);反之,若责任周期XSl 小于责任周期XS2,代表系统判断触碰点P2、P3为实际触碰点(如图5B所示)。 If the duty cycle is greater than the duty cycle XSl XS2, represents the system determining the touch point P1, P4 is touched points (FIG. 5A); Conversely, if the duty cycle is less than the duty cycle XSl XS2, represents the system determining touch points P2, P3 is a touched points (FIG. 5B). 如此一来即可从四个系统判断触碰点获得两个实际触碰点。 Thus obtained two touched points can determine the touch point from the four systems.

[0039] 在图2A、图2B、图5A与图5B中,方向X是由左朝右,方向Y是由下朝上,但本发明并不限于此。 [0039] In FIGS. 2A, 2B, and 5A and 5B, the X direction is from the left to the right, upward direction Y is represented by the following, but the present invention is not limited thereto. 但熟习本领域技术者应当知道,上述各实施例方向X改为由右朝左或将方向Y 改为由上朝下,只要适当调整触碰侦测模组30的判别方式,也同样可从四个系统判断触碰点获得两个实际触碰点。 However, one skilled in the art shall know that, the embodiments described above each of X direction from right to left or downward to the Y direction by appropriate adjustments as long as the touch detection mode determination module 30, also available from The system determines the touch point four two touched points is obtained.

[0040] 综上所述,本发明将多个侦测单元沿相垂直的第一方向与第二方向排成一阵列。 [0040] In summary, the present invention is a plurality of detection units along a first direction perpendicular to the second direction are arranged in an array. 上述侦测单元的电容值沿第一方向递减。 The capacitance value of the decreasing detection unit in the first direction. 当发生四个系统判断触碰点时,可沿第二方向依序对侦测单元进行侦测,以依序获得一第一责任周期与第二责任周期。 When determining the touch point occurs four systems, for sequentially detecting unit may detect the second direction, to sequentially obtain a first duty and the second duty cycle. 接着再依据第一责任周期与第二责任周期的大小,即可从四个系统判断触碰点判断出二个实际触碰点。 Followed by a first duty cycle based on the magnitude of the second duty cycle, determining the touch point to the two touched points is determined from the four systems.

[0041] 虽然本发明已以实施例公开如上,然其并非用以限定本发明,任何所属技术领域中具有通常知识者,在不脱离本发明的精神和范围内,当可作些许更动与润饰,故本发明的保护范围当视前述的权利要求范围所界定者为准。 [0041] While the invention has been disclosed in the above embodiments, they are not intended to limit the present invention, any skilled in the art having ordinary knowledge in the present invention without departing from the spirit and scope, it is intended that modifications and retouch range of their equivalents, and therefore the scope of the present invention is best preceding claims.

Claims (8)

  1. 1. 一种电容式触碰面板,其特征在于,包括:一触碰侦测板,包括多个侦测单元,该些侦测单元沿一第一方向与一第二方向排列以形成一阵列,其中该些侦测单元为电容型态,该些侦测单元的电容值沿该第一方向递减;该些侦测单元的电容值沿该第二方向维持不变;以及一触碰侦测模组,耦接该触碰侦测板,用以侦测至少二实际触碰点;当侦测到四个系统判断触碰点时,沿该第二方向依序对该些侦测单元进行侦测,以依序侦测到一第一责任周期与一第二责任周期,再依据该第一责任周期与该第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点;其中,上述四个系统判断触碰点形成一矩形,上述四个系统判断触碰点分别为一第一系统判断触碰点、一第二系统判断触碰点、一第三系统判断触碰点与一第四系统判断触碰点,该第一系统 1. A capacitive touch panel, comprising: detecting a touch panel, comprising a plurality of detecting units, the plurality of detecting units are arranged along a first direction and a second direction to form an array wherein the plurality of patterns as a capacitance detecting unit, a capacitance value of the plurality of detecting units along the first direction is decremented; capacitance value of the plurality of detecting units along the second direction remains unchanged; and a touch detection module coupled to the touch detection plate for detecting the at least two touched points; when the detected four touch point determination system, the second direction along the sequence of these detection unit detector to sequentially detect a first duty cycle and a second duty cycle, again according to the magnitude of the first duty and the second duty determination of the touch point from the system to obtain two real four touch point; wherein the above-mentioned four systems form a rectangular touch point determination, the system determines the four touch points are a first touch point determination system, the second system determines a touch point, a third system a fourth touch point is determined with the touch point determination system, the first system 断触碰点与该第四系统判断触碰点位于该矩形的一斜对角,该第二系统判断触碰点与该第三系统判断触碰点位于该矩形的另一斜对角;该第一责任周期代表该第一系统判断触碰点或该第二系统判断触碰点的信息,该第二责任周期代表该第三系统判断触碰点或该第四系统判断触碰点的信息;该第一系统判断触碰点沿该第一方向与该第二方向移动皆能朝该第四系统判断触碰点靠近;若该第一责任周期大于该第二责任周期,该第一系统判断触碰点与该第四系统判断触碰点为上述二个实际触碰点;若该第一责任周期小于该第二责任周期,该第二系统判断触碰点与该第三系统判断触碰点为上述二个实际触碰点ο Off the fourth touch point determination system touch point of the rectangle located at a diagonal, the second system to the third touch point determination system determines the touch point located on the other diagonal of the rectangle diagonal; the information representative of the first duty of the first touch point determination system determines the touch point information or the second system, the second duty determination system on behalf of the third or the fourth touch point of the touch point determination system ; the system determines a first touch point along the first direction and the second direction toward Jieneng determining the touch point is close to the fourth system; if the first duty is greater than the second duty cycle, the first system and the fourth touch point determination system determines the touch point of said two touched points; if the first duty is smaller than the second duty cycle, the second system to the third touch point determination system determines the touch touch point of the above-mentioned two touched points ο
  2. 2. 一种电容式触碰面板,其特征在于,包括:一触碰侦测板,包括多个侦测单元,该些侦测单元沿一第一方向与一第二方向排列以形成一阵列,其中该些侦测单元为电容型态,该些侦测单元的电容值沿该第一方向递减;该些侦测单元的电容值沿该第二方向维持不变;以及一触碰侦测模组,耦接该触碰侦测板,用以侦测至少二实际触碰点;当侦测到四个系统判断触碰点时,沿该第二方向依序对该些侦测单元进行侦测,以依序侦测到一第一责任周期与一第二责任周期,再依据该第一责任周期与该第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点;其中,上述四个系统判断触碰点形成一矩形,上述四个系统判断触碰点分别为一第一系统判断触碰点、一第二系统判断触碰点、一第三系统判断触碰点与一第四系统判断触碰点,该第一系统 A capacitive touch panel, comprising: detecting a touch panel, comprising a plurality of detecting units, the plurality of detecting units are arranged along a first direction and a second direction to form an array wherein the plurality of patterns as a capacitance detecting unit, a capacitance value of the plurality of detecting units along the first direction is decremented; capacitance value of the plurality of detecting units along the second direction remains unchanged; and a touch detection module coupled to the touch detection plate for detecting the at least two touched points; when the detected four touch point determination system, the second direction along the sequence of these detection unit detector to sequentially detect a first duty cycle and a second duty cycle, again according to the magnitude of the first duty and the second duty determination of the touch point from the system to obtain two real four touch point; wherein the above-mentioned four systems form a rectangular touch point determination, the system determines the four touch points are a first touch point determination system, the second system determines a touch point, a third system a fourth touch point is determined with the touch point determination system, the first system 断触碰点与该第四系统判断触碰点位于该矩形的一斜对角,该第二系统判断触碰点与该第三系统判断触碰点位于该矩形的另一斜对角;该第一系统判断触碰点沿该第一方向与该第二方向移动皆能朝该第四系统判断触碰点靠近;若该第一责任周期大于该第二责任周期,该第一系统判断触碰点与该第四系统判断触碰点为上述二个实际触碰点;若该第一责任周期小于该第二责任周期,该第二系统判断触碰点与该第三系统判断触碰点为上述二个实际触碰点; 该触碰侦测模组进一步包括:多个脉宽调变信号产生器,分别耦接该些侦测单元,上述二个实际触碰点落于该些侦测单元的一第一侦测单元与一第二侦测单元,该第一侦测单元与该第二侦测单元分别对应于该些脉宽调变信号产生器的一第一脉宽调变信号产生器与一第二脉宽调变信号产生器, 该第一脉宽 Off the fourth touch point determination system touch point of the rectangle located at a diagonal, the second system to the third touch point determination system determines the touch point located on the other diagonal of the rectangle diagonal; the the system determines a first touch point along the first direction and the second direction toward Jieneng determining the touch point is close to the fourth system; if the first duty is greater than the second duty cycle, the system first determines contact determining the touch point of the touch point of the fourth system said two touched points; if the first duty is smaller than the second duty cycle, the second touch point determination system determines the touch point with the third system the above-mentioned two actual touch point; the touch detection module further comprises: a plurality of PWM signal generators respectively coupled to the plurality of detecting means, the two actual touch points fall within the plurality of investigation a first detection unit of the sensing unit and a second detecting unit, the first detection unit and the second detecting means respectively corresponding to the plurality of PWM signal generator is a first pulse-width modulation a second signal generator and the PWM signal generator, the first pulse width 调变信号产生器与该第二脉宽调变信号产生器沿该第二方向依序排列,在此情况下该第一脉宽调变信号产生器会先输出对应的一第一脉宽调变信号,接着该第二脉宽调变产生器会再输出对应的一第二脉宽调变信号,其中该第一脉宽调变信号与该第二脉宽调变信号的责任周期分别由该第一侦测单元与该第二侦测单元的电容值所决定;该第一脉宽调变信号的责任周期反映出该第一责任周期,该第二脉宽调变信号的责任周期反映出该第二责任周期;以及一触碰点判断模组,耦接该些脉宽调变信号产生器,依序接收该第一脉宽调变信号与该第二脉宽调变信号,并依据该第一脉宽调变信号与该第二脉宽调变信号的责任周期之大小,从上述四个系统判断触碰点中获得上述二个实际触碰点。 Modulation signal generator and the second PWM signal generator arranged sequentially along the second direction, in which case the first PWM signal generator will first output a first pulse width modulation corresponding to varying signal, then the second PWM generator will then output corresponding to a second PWM signal, wherein the first PWM signal with the duty cycle of the second PWM signal, respectively, by the first detection unit is determined by the capacitance value of the second detecting unit; a first duty cycle of the pulse width modulation signal reflects the first duty cycle, the duty cycle of the second PWM signal is reflected the second responsibility of the period; and a touch point determining module, being coupled to the PWM signal generator, sequentially receiving the first PWM signal and the second PWM signal, and according to the size of the duty cycle of the second PWM signal to the first PWM signal, the system is determined from the four touch points obtained in the above-described two touched points.
  3. 3.如权利要求1所述的电容式触碰面板,其特征在于,该第一方向与该第二方向垂直。 The capacitive touch panel according to claim 1, wherein the first direction is perpendicular to the second direction.
  4. 4.如权利要求3所述的电容式触碰面板,其特征在于,该第一方向为水平轴、该第二方向为垂直轴。 The capacitive touch panel as claimed in claim 3, wherein the first direction is a horizontal axis, the second direction is the vertical axis.
  5. 5.如权利要求3所述的电容式触碰面板,其特征在于,该第一方向为垂直轴、该第二方向为水平轴。 The capacitive touch panel according to claim 3, wherein the first direction is the vertical axis, the second direction is a horizontal axis.
  6. 6.如权利要求1所述的电容式触碰面板,其特征在于,位于上述二个实际触碰点的各该侦测单元,其电容值会上升。 6. The capacitive touch panel according to claim 1, wherein the detecting unit is located in each of said two actual touch points, the capacitance value increases.
  7. 7. 一种鬼影点判别方法,适用于一电容式触碰面板,其特征在于,该电容式触碰面板包括一触碰侦测板与一触碰侦测模组,该触碰侦测板进一步包括多个侦测单元,该些侦测单元沿一第一方向与一第二方向排列以形成一阵列,该第一方向与该第二方向垂直,该些侦测单元为电容型态,该些侦测单元的电容值沿该第一方向递减,该些侦测单元的电容值沿该第二方向维持不变;该鬼影点判别方法,包括:当侦测到四个系统判断触碰点时,沿该第二方向依序对该些侦测单元进行侦测,以依序侦测到一第一责任周期与一第二责任周期;以及依据该第一责任周期与该第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点;其中,上述四个系统判断触碰点形成一矩形,上述四个系统判断触碰点分别为一第一系统判断触碰点、一第二系统判断触碰 A ghost point discrimination method for a capacitive touch panel, wherein the capacitive touch panel includes a touch panel detecting a touch and the detection module, the touch detection plate further comprises a plurality of detecting units, the plurality of detecting units are arranged along a first direction and a second direction to form an array perpendicular to the first direction and the second direction, the plurality of capacitive type detecting unit , the capacitance value of the plurality of detecting units along the first direction decreasing the capacitance value of the plurality of detecting units along the second direction remains unchanged; the ghost point discrimination method, comprising: determining when the system detects four when the touch point along the second direction, some of the detecting unit sequentially detects, to sequentially detect a first duty cycle and a second duty cycle; and a duty cycle according to the first and the second duty cycle of the size of two of the four available from the system determines the touch point two touched points; wherein, the system determines the four points forming a rectangular touch, the system determines the four touch points are a first The system determines the touch point, the system determines a second touch 、一第三系统判断触碰点与一第四系统判断触碰点,该第一系统判断触碰点与该第四系统判断触碰点位于该矩形的一斜对角,该第二系统判断触碰点与该第三系统判断触碰点位于该矩形的另一斜对角;该第一责任周期代表该第一系统判断触碰点或该第二系统判断触碰点的信息,该第二责任周期代表该第三系统判断触碰点或该第四系统判断触碰点的信息;该第一系统判断触碰点沿该第一方向与该第二方向移动皆能朝该第四系统判断触碰点靠近;若该第一责任周期大于该第二责任周期,该第一系统判断触碰点与该第四系统判断触碰点为上述二个实际触碰点;若该第一责任周期小于该第二责任周期,该第二系统判断触碰点与该第三系统判断触碰点为上述二个实际触碰点ο , A third system and a fourth touch point determination system determines the touch point, the system determines a first touch point and the fourth touch point determination system is located at a diagonal of the rectangle diagonal, the second determination system the third touch point and the touch point determination system located in the other diagonal of the rectangle; the first duty determination system representing the first touch point information or the second touch point determination system, the second two duty cycle representing the third system determines the touch point determination information system or the fourth touch point; the system determines a first touch point along the first direction towards the fourth Jieneng system and the second direction, near the touch point determination; if the first responsibility; if the first duty is greater than the second duty cycle, the system determines a first touch point and the fourth point of the touch system determines said two touched points is less than the second duty cycle, the second system to the third touch point determination system determines the touch point of said two touched points ο
  8. 8. 一种鬼影点判别方法,适用于一电容式触碰面板,其特征在于,该电容式触碰面板包括一触碰侦测板与一触碰侦测模组,该触碰侦测板进一步包括多个侦测单元,该些侦测单元沿一第一方向与一第二方向排列以形成一阵列,该第一方向与该第二方向垂直,该些侦测单元为电容型态,该些侦测单元的电容值沿该第一方向递减,该些侦测单元的电容值沿该第二方向维持不变;该触碰侦测模组进一步包括:多个脉宽调变信号产生器,分别耦接该些侦测单元,二个实际触碰点落于该些侦测单元的一第一侦测单元与一第二侦测单元, 该第一侦测单元与该第二侦测单元分别对应于该些脉宽调变信号产生器的一第一脉宽调变信号产生器与一第二脉宽调变信号产生器,该第一脉宽调变信号产生器与该第二脉宽调变信号产生器沿该第二方向依序排列,在此情况下该 A ghost point discrimination method for a capacitive touch panel, wherein the capacitive touch panel includes a touch panel detecting a touch and the detection module, the touch detection plate further comprises a plurality of detecting units, the plurality of detecting units are arranged along a first direction and a second direction to form an array perpendicular to the first direction and the second direction, the plurality of capacitive type detecting unit , the capacitance value of the plurality of detecting units along the first direction decreasing the capacitance value of the plurality of detecting units along the second direction remains unchanged; the touch detection module further comprises: a plurality of pulse width modulation signals generators respectively coupled to the plurality of detection units, two actual touch points fall within a first detection unit of the plurality of detecting unit and a second detecting unit, the first detection unit and the second detecting means respectively corresponding to the plurality of PWM signal generator is a first PWM signal generator and a second pulse width modulation signal generator, the first PWM signal generator and the the second PWM signal generator arranged sequentially along the second direction, which in this case 第一脉宽调变信号产生器会先输出对应的一第一脉宽调变信号,接着该第二脉宽调变产生器会再输出对应的一第二脉宽调变信号,其中该第一脉宽调变信号与该第二脉宽调变信号的责任周期分别由该第一侦测单元与该第二侦测单元的电容值所决定;该鬼影点判别方法,包括:当侦测到四个系统判断触碰点时,沿该第二方向依序对该些侦测单元进行侦测,以依序侦测到一第一责任周期与一第二责任周期;其中,该第一脉宽调变信号的责任周期反映出该第一责任周期,该第二脉宽调变信号的责任周期反映出该第二责任周期;以及依据该第一责任周期与该第二责任周期的大小从上述四个系统判断触碰点中获得二个实际触碰点;其中,上述四个系统判断触碰点形成一矩形,上述四个系统判断触碰点分别为一第一系统判断触碰点、一第二系统判断触碰点、一 The first PWM signal generator will first output a first PWM signal corresponding to, and then the second PWM generator will then output a corresponding second PWM signal, wherein the first a PWM signal with the duty cycle of the second PWM signals are determined by the first detection unit and the capacitance value of the second detecting means; the ghost point discrimination method, comprising: when reconnaissance when the system determines that the sensed touch point four, in sequence along the second direction of the detection unit to detect some, to sequentially detect a first duty cycle and a second duty cycle; wherein, the first the duty cycle of a PWM signal reflects the first duty cycle, the duty cycle of the second PWM signal is reflected to the second duty cycle; according to the first duty and the second duty cycle size obtaining two touched points is determined from the system of the four touch points; wherein, the system determines the four points forming a rectangular touch, the system determines the four touch points are determined as a first touch system point, the system determines a second touch point, a 三系统判断触碰点与一第四系统判断触碰点,该第一系统判断触碰点与该第四系统判断触碰点位于该矩形的一斜对角,该第二系统判断触碰点与该第三系统判断触碰点位于该矩形的另一斜对角;该第一系统判断触碰点沿该第一方向与该第二方向移动皆能朝该第四系统判断触碰点靠近;若该第一责任周期大于该第二责任周期,该第一系统判断触碰点与该第四系统判断触碰点为上述二个实际触碰点;若该第一责任周期小于该第二责任周期,该第二系统判断触碰点与该第三系统判断触碰点为上述二个实际触碰点。 Three systems, and a fourth touch point determination system determines the touch point, the system determines a first touch point and the fourth touch point determination system located a diagonal of the rectangle, the second touch point determination system Analyzing the third system touch point located on the other diagonal of the rectangle diagonal; the system determines a first touch point along the first direction and the second direction toward Jieneng determining the touch point is close to the fourth system ; if the first duty is greater than the second duty cycle, the system determines a first touch point and the fourth point of the touch system determines said two touched points; if the first duty is smaller than the second duty cycle, the second system to the third touch point determination system determines the touch point of said two touched points.
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